[T]he methods we use to measure our economies are becoming increasingly out of date. The statistical conventions on which we base our estimates were adopted a half-century ago, at a time when the economy was producing relatively similar physical goods. Today's economy is radically different and changing rapidly - the result of technological innovation, the rising value of intangible, knowledge-based assets, and the internationalization of economic activity.

In light of these challenges, UK Chancellor of the Exchequer George Osborne asked me ten months ago to assess the United Kingdom's current and future statistical needs. While my research focused on the UK, the challenges of producing relevant, high-quality economic statistics are the same in many countries.

Recent technological advances have radically altered the way people conduct their lives, both at work and at play. The advances in computing power underpinning the digital revolution have led not only to rapid quality improvements and product innovation, but also to new, connectivity-driven ways of exchanging and providing services.

One particular challenge for economic measurement stems from the fact that an increasing share of consumption comprises digital products delivered at a zero price or funded through alternative means, such as advertising. While free virtual goods clearly have value to consumers, they are entirely excluded from GDP, in accordance with internationally accepted statistical standards. As a result, our measurements may not be capturing a growing share of economic activity.